e6f829f4dbf3fe70a0bc922eeabf06186b5183bd
hiram
  Thu Dec 3 11:01:03 2015 -0800
adding additional gap n description refs #9868

diff --git src/hg/lib/agpGap.as src/hg/lib/agpGap.as
index 19b0e6d..26ca1ff 100644
--- src/hg/lib/agpGap.as
+++ src/hg/lib/agpGap.as
@@ -1,13 +1,12 @@
 table agpGap
 "Gaps in golden path"
     (
     string chrom;	"Reference sequence chromosome or scaffold"
     uint chromStart;	"start position in chromosome"
     uint chromEnd;	"end position in chromosome"
-    int ix;             "ix of this fragment (useless)"
-    char[1] n;          "always 'N'"
+    int ix;             "index count of this fragment (obsolete/useless)"
+    char[1] n;          "'N' for gaps of known size, 'U' for gaps of unknown size"
     uint size;          "size of gap"
-    string type;        "contig, clone, fragment, etc."
+    string type;        "scaffold, contig, clone, fragment, etc."
     string bridge;      "yes, no, mrna, bacEndPair, etc."
     )
-